Author Topic: Magpie's 1964/1965 Benly 150 Twin Project (Read 55641 times)

RAFster122s · « **Reply #100 on:** August 09, 2012, 07:46:25 PM »

Odds are you don't need to fret much about that side as you aren't seeing a lot of hp out of these motors. I think I would have just used sand paper and my thumb to knock down the edges of the pits so there are no sharp edges, then have a 3 way Serdi cut valve job and reassemble. Odds are she'll run fine. Then if it bothers you, keep an eye out for a CA95 head in better shape. These motors are easy to work on and it isn't a huge expense to do over if it needs it. I'm betting you'll be fine.
Now if you are going to race it, different story.
Go oversize on the pistons for a little more displacement would compensate for any compression loss.

Magpie · « **Reply #101 on:** August 09, 2012, 10:34:51 PM »

Thanks David! Cliff.

Magpie · « **Reply #102 on:** August 10, 2012, 04:05:46 PM »

A machinist at a local machine shop, a CB750 nut too, deemed my work to be okay. Actually he said excellent but why brag eh?

So he's planing the head, deglazing the bores and jet cleaning the head and cylinders. Should be ready for paint on Monday. Cliff.

Sam Green Racing · « **Reply #103 on:** August 14, 2012, 09:09:44 AM »

That looks OK Cliff, I've seen them put back together no where near that good and they've been OK.

Sam.

Magpie · « **Reply #104 on:** August 14, 2012, 11:18:13 AM »

Thanks Sam! The head and cylinders are at the machine shop. There's a machinist there that's a 750 nut. He's going to make sure it's all the surface are flat, deglazing the cylinder bores and jet washing them. Slowly slowly. Cliff.

Sam Green Racing · « **Reply #105 on:** August 15, 2012, 03:11:43 AM »

I've never seen a Benly head warp Cliff. Surfacing the head will bump up the compression and push the valve timing out a tad, tell him to take as little off as he can if it really dose need it.

Sam.

Magpie · « **Reply #106 on:** August 15, 2012, 07:41:19 AM »

He just cleaned it up a bit Sam so it has a nice gasket surface. It came up quite nice after the jet wash and painting. I lapped the vales in yesterday too. Now to get that piston and rings on ebay. He deglazed the cylinders too and they received a coat of shiny black engine paint. My Ukrainian spray booth is working out quite well. Amazing what us Ukrainians can come up with! May have to expand it a bit to paint the body parts. Cliff.

Magpie · « **Reply #107 on:** August 16, 2012, 02:57:37 PM »

Scored a C95 piston from RetoBikes (nice people) http://www.olypen.com/retro/ Now to get some standard sized rings. There's a bunch available on eBay from Thailand. I may have to take a deep breath and trust the positive feedback these sellers have. Cliff.

krusty · « **Reply #108 on:** August 17, 2012, 10:56:37 PM »

Magpie. I have a set (for 2 pistons) STD genuine Honda. Can send for $30 (including shipping).

Greggo · « **Reply #109 on:** August 18, 2012, 08:18:51 AM »

If the ones Krusty (the clown?

) aren't what you need, I've had great luck finding parts through Ohio Cycle here in the States. http://www.ohiocycle.com/

Magpie · « **Reply #110 on:** August 18, 2012, 08:38:15 AM »

Thanks Krusty but I have ordered some on eBay yesterday morning. http://www.ebay.com/itm/260600924808?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649 The seller has lots of postive feedback and responded to my questions very quickly so, hopefully, he's true to his word. Cliff.

RAFster122s · « **Reply #111 on:** August 18, 2012, 05:10:47 PM »

Curious why you went with olypen's pistons and didn't get rings from them as well?
Any differences between CA95 and C95 pistons?
David

Magpie · « **Reply #112 on:** August 18, 2012, 09:15:35 PM »

David, I think the CA95 pistons are higher compression. Olypen had a pair of CA95 pistons on his website but when I called they were sold so I grabbed the C95 piston as one of the two I have is still good. They didn't have any piston rings on hand. The Ca95 is 17 horsepower and the C95 is 13 I believe. The CA95 cam is different too.
Cheers,
Cliff.

HondanutRider · « **Reply #113 on:** August 19, 2012, 05:24:17 AM »

Quote from: Magpie on August 18, 2012, 09:15:35 PM

The Ca95 is 17 horsepower and the C95 is 13 I believe. The CA95 cam is different too.
Cheers,
Cliff.

Actually, Honda quoted 13.5 horsepower for the C95. Their carburetor was also different from what was on the CA95.

Magpie · « **Reply #114 on:** August 19, 2012, 06:31:08 AM »

Thanks! learning more about this bike all the time. My carb is different again- the choke plate is gone. Maybe that's what went into the engine and did all that damage! Cliff.

Sam Green Racing · « **Reply #115 on:** August 20, 2012, 04:23:23 AM »

Your carb is like a lot of carbs, it's a common fault.

They still work ok though.

Sam.

krusty · « **Reply #116 on:** August 20, 2012, 05:15:43 AM »

The CA95 carb has what is called a 'Power Jet' that the C95 carb does not have. I recall asking an early Honda guru (it may have been Troyce Walls) about this and he (if it was him) told me that the power jet made no discernable difference to performance.

HondanutRider · « **Reply #117 on:** August 20, 2012, 06:04:38 AM »

Quote from: krusty on August 20, 2012, 05:15:43 AM

The CA95 carb has what is called a 'Power Jet' that the C95 carb does not have. I recall asking an early Honda guru (it may have been Troyce Walls) about this and he (if it was him) told me that the power jet made no discernable difference to performance.

...but the compression and cam differences likely do make a difference between the C95 and CA95 (about 3 HP according to the ratings, which is close to 25%).

Magpie · « **Reply #118 on:** August 20, 2012, 07:38:17 AM »

Thanks Sam! Cliff.

Magpie · « **Reply #119 on:** August 20, 2012, 10:34:47 PM »

Poor Ben, first he's just hanging around then he lays down for a nap! Cliff.

RAFster122s · « **Reply #120 on:** August 21, 2012, 12:41:11 AM »

Is "Ben" going to get a fresh coat of paint or stay original? Buffing out any of "Ben's" aluminum or chrome?
How's the electrical?

Magpie · « **Reply #121 on:** August 21, 2012, 09:33:06 AM »

The paint it too far gone to buff back to life and lots of rusty metal under the battery area. I've been buffing and painting as I go along. So far the engine has received all the love. As soon as the rings and piston arrive I'll put the motor back together. I wiring is in pretty good shape but have a number of splits in the sheathing. i have to be careful pulling the connectors apart as they are mostly stuck and when you pull on the the wires beome exposed near the connector. I've ahd to spray some release in them and then use small needle nose pliers to get them apart safely. Thankfully there's not much chrome. The rims will need to be done and new spokes needed.
Cliff.

RAFster122s · « **Reply #122 on:** August 21, 2012, 07:25:30 PM »

The rear fender brace & shock mounts will polish up nicely even if you have to start with sandpaper, but you'll want to probably clear coat them after polishing. Many of the grommets and caps/plugs are still available new/repro so that is good. Wasnt sure if the brown was rust below the battery compartment or not. Shouldn't be too awful a job to clean up. Probably the hardest thing is getting dents and dings and creases worked out of the front fender so it looks good when the shiny paint goes on.
Good luck!

Magpie · « **Reply #123 on:** August 21, 2012, 10:27:53 PM »

yes, the shocks came up nicely. One has some heavy marking at the bottom of it but I'll still use it. Cliff.

Magpie · « **Reply #124 on:** August 21, 2012, 10:33:14 PM »

Bit more work tonight. Removed the handlebars, switches, turn signals and handle bar mount and worked on them. The switches needed attention inside and out as well as some soldering the starter wire back to the button. I'll have to find some silver heat shrink tubing to repair the sheathing on the wiring. The polished parts came up nicely I think. I'll need to find a switch "knob" for the left one. Cliff.

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Author Topic: Magpie's 1964/1965 Benly 150 Twin Project (Read 55641 times)